190 lines
4.9 KiB
C
190 lines
4.9 KiB
C
/* packet-imap.c
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* Routines for imap packet dissection
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* Copyright 1999, Richard Sharpe <rsharpe@ns.aus.com>
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*
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* $Id: packet-imap.c,v 1.19 2002/01/24 09:20:48 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* Copied from packet-tftp.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/strutil.h>
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static int proto_imap = -1;
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static int hf_imap_response = -1;
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static int hf_imap_request = -1;
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static gint ett_imap = -1;
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#define TCP_PORT_IMAP 143
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static void
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dissect_imap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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gboolean is_request;
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proto_tree *imap_tree, *ti;
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gint offset = 0;
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const u_char *line;
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gint next_offset;
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int linelen;
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int tokenlen;
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const u_char *next_token;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "IMAP");
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/*
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* Find the end of the first line.
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*
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* Note that "tvb_find_line_end()" will return a value that is
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* not longer than what's in the buffer, so the "tvb_get_ptr()"
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* call won't throw an exception.
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*/
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linelen = tvb_find_line_end(tvb, offset, -1, &next_offset);
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line = tvb_get_ptr(tvb, offset, linelen);
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if (pinfo->match_port == pinfo->destport)
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is_request = TRUE;
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else
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is_request = FALSE;
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if (check_col(pinfo->cinfo, COL_INFO)) {
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/*
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* Put the first line from the buffer into the summary
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* (but leave out the line terminator).
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*/
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s: %s",
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is_request ? "Request" : "Response",
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format_text(line, linelen));
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}
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if (tree) {
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ti = proto_tree_add_item(tree, proto_imap, tvb, offset, -1,
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FALSE);
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imap_tree = proto_item_add_subtree(ti, ett_imap);
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if (is_request) {
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proto_tree_add_boolean_hidden(imap_tree,
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hf_imap_request, tvb, 0, 0, TRUE);
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} else {
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proto_tree_add_boolean_hidden(imap_tree,
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hf_imap_response, tvb, 0, 0, TRUE);
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}
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/*
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* Show the first line as tags + requests or replies.
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*/
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/*
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* Extract the first token, and, if there is a first
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* token, add it as the request or reply tag.
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*/
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tokenlen = get_token_len(line, line + linelen, &next_token);
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if (tokenlen != 0) {
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if (is_request) {
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proto_tree_add_text(imap_tree, tvb, offset,
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tokenlen, "Request Tag: %s",
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format_text(line, tokenlen));
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} else {
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proto_tree_add_text(imap_tree, tvb, offset,
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tokenlen, "Response Tag: %s",
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format_text(line, tokenlen));
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}
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offset += next_token - line;
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linelen -= next_token - line;
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line = next_token;
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}
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/*
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* Add the rest of the line as request or reply data.
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*/
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if (linelen != 0) {
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if (is_request) {
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proto_tree_add_text(imap_tree, tvb, offset,
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linelen, "Request: %s",
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format_text(line, linelen));
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} else {
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proto_tree_add_text(imap_tree, tvb, offset,
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linelen, "Response: %s",
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format_text(line, linelen));
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}
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}
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/*
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* XXX - show the rest of the frame; this requires that
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* we handle literals, quoted strings, continuation
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* responses, etc..
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*
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* This involves a state machine, and attaching
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* state information to the packets.
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*/
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}
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}
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void
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proto_register_imap(void)
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{
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static hf_register_info hf[] = {
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{ &hf_imap_response,
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{ "Response", "imap.response",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if IMAP response", HFILL }},
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{ &hf_imap_request,
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{ "Request", "imap.request",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if IMAP request", HFILL }}
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};
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static gint *ett[] = {
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&ett_imap,
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};
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proto_imap = proto_register_protocol("Internet Message Access Protocol",
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"IMAP", "imap");
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proto_register_field_array(proto_imap, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_imap(void)
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{
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dissector_handle_t imap_handle;
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imap_handle = create_dissector_handle(dissect_imap, proto_imap);
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dissector_add("tcp.port", TCP_PORT_IMAP, imap_handle);
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}
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